This is a sample from a choir recording with the SPS200 and without any Pre Eq on the raw A-Format. The Surroundzone plugin was used in the Blumlein (two figure eight) mode for stereo output.

ChoirTestWithoutPreEq16Bit

This is a sample from a choir recording done with the SPS200 but now with added Pre Eq on the raw A-Format tracks. Then, the eq-ed signals went into the Surroundzone plugin which was used to make stereo with the Blumlein (two figure eight) setup. The picture shows the provisional Eq that was applied within Reaper, based on my own measurement of the SPS200

ChoirTestWithPreEq16Bit

In this instance no Pre-Eq was applied to the raw A-Format.

TestPianoTrioWithoutPreEq16Bit

In this instance Pre-Eq WAS applied to the raw A-Format of the SPS200

TestPianoTrioWithPreEq16

This is recorded from the same position as the Soundfield SPS200 (same stand), but with twe Sennheiser MKH20 mics as a (50cm) spaced omni setup. This may represent a good reference.

Lucas Guitink